wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478), causing an out-of-bounds read from the pre-allocated DMA buffer when skb_put_data copies new_len bytes. The USB transport already validates this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the PCIe path does not. Add a check that new_len does not exceed the DMA buffer size.
CVE-2026-74410
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-74410
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "913bd7d3d3d842b5c1d2b908a0201efa8fc79793",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "45abc14ab3f15da7d689f1a8809c1a01240a94d9",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "08193e733e5d4790e6c937af86d78793b02709be",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "6a3c384393d3f0b41669ed5a2e88744aad9d87c8",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "26c183a86ea4dd1f2ff90c6f783649e7f5722a10",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "01155ded5d4dad61840a9a3c33ab56778ef1f100",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "1554fa522f16ec7c5c342ad33fe734eeb6eb2452",
"versionType": "git"
},
{
"status": "affected",
"version": "e3037485c68ec1a299ff41160d8fedbd4abc29b9",
"lessThan": "6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/realtek/rtw88/pci.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/realtek/rtw88/pci.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74410
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33144 · Revision 1
- Added to Heist Feed
- Publisher date